Species › Plants › Cow Parsnip

Cow Parsnip

Heracleum maximum

CommonPlant
Illustration of Cow Parsnip (Heracleum maximum)
Safety note: Avoid contact with skin; can cause irritation.

Cow Parsnip is a large perennial with broad leaves and white umbrella-like flower clusters. Despite its imposing size, it is an important source of nectar for pollinators.

Habitat
It grows in moist, rich soils along streams and in meadows.
Diet
Bees, butterflies, and other insects are attracted to its flowers.
How common
Common

Best time to see a Cow Parsnip

The best time to see a Cow Parsnip is April–June, when about 62% of U.S. sightings happen, based on 44,647 research-grade iNaturalist observations.

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Not certain it is a Cow Parsnip? What plant is this? walks through what to check first and the lookalikes that catch people out.

Often confused with

Poison Hemlock - see how to tell them apart

Recent Cow Parsnip sightings near you

Live, research-grade observations from iNaturalist. Allow location to center the map on you.

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